Dustless feeder and mixer for flour-mills.



"No. 805,899. I PATENTED wovrza, 1905.

. R.;B. BULL. DUSTLESS FEEDER AND MIXER FOR FLOUR MILLS.

' Y APYPLIOATIONPILED mums. 1905.

0% r u k) F a Q m N m O Q m 1 G M mxw M O 0 m mmh UNITED STATES PATENT OFFICE.

ROBERT B. BOLL, OF MULKEYTOWN, IIJLINOIS, ASSIGNOR'OF ONE-HALF TO HERMANN LIEBSTER, OF MULKEYTOWN, ILLINOIS.

Specification of Letters Patent.

Patented Nov. 28, 1905.

Application filed January 26, 1905. Serial No. 242,744.

To all whom it may concern.-

Be it known that I, ROBERT B. BoLL, a citizen of the United States, and a resident of Mulkeytown, Illinois, have invented certain new and useful Improvements in Dustless Feeders and Mixers for Flour-Mills, of which the following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in dustless feeders and mixers for flour-mills; and it consists of the novel features herein shown, described, and claimed.

In the drawings, Figure 1 is a vertical crosssection on the line 1 1 of Fig. 2 and looking in the direction indicated by the arrow. Fig. 2 is a side elevation as seen looking in the di- -.rection indicated by the arrow 2 in Fig. 3.

Fig. 3 is an end elevation looking in the direction indicated by the arrow 3 in Fig.2.

Fig. 4 is a longitudinal sectional detail on the line 4 .4 of Fig. 1. Fig. 5 is an enlarged sectional detail of the screen.

Referring to the drawings in detail, the sills 6 and 7 are mounted in parallel position upon the floor 8. Posts 9 and 10 extend upwardly from the sill 6, and similar posts 11 and 12 extend upwardly from the sill 7. The upper ends of the posts 9 and 10 are connected by a cross-piece 13, and the upper ends of the posts 11 and 12 are connected by a cross-piece 14. The brace 15 connects the upper ends of the posts 10 and .12, and a similar brace 16 connects the upper ends of the posts 9 and 11. A brace 17 connects the posts 10- and 12 near their centers, and a similar brace 18 connects the posts 9 and 11 near their centers. A brace 19 connects the posts 9 and 10 at points a short distance below the braces 17 and 18, and a similar brace (not shown) connects theposts l1 and 12. The space between the posts 9 and 10 and the cross-piece 13 and brace 19 is around the shaft and comprisesthe inclined wall 27, the oppositely-inclined wall 28, and the semicircular wall 29, connecting the lower edges of the walls 27 and 28 concentric to the shaft 25, there being a screen-opening 30 in said wall 29. Hubs 31 and 32 are mounted upon the shaft 25 just inside of the The screen comprises the foraminous sheet .36, the lower frame member 37, and the upper frame member 38, said frame members being secured together to clamp theedges of the foraminous sheet and said frame members being so shaped that the foraminous sheet is above the upper face of the upper frame member. The screen is concavo-convex and fits in the opening 30 in the wall 29, said screen being removed and replaced through the opening 39. A shutter 40 is slidingly mounted below the screen, said shutter being moved by the handle 41 to control the opening 30 and regulate the amount of flour or feed which may pass through the opening. Beater-arms 33 are adjusted to and from the screen by the set-screws 42 in the hubs 31 and 32. A door 43 is in position to close the opening 39. A cover 44 closes the flour-box within the walls 20 21 and 22 and 23.

The flour or feed may be emptied intothe flour-box by removing the cover 44 or by raising either wall 22 or 23, and said walls provide access to the flour or feed box for any purpose.

The device is used as a feeder and mixer for flours and for feeding and mixing ofl -grade flour, feeding material from choke-ups, &c.

By manipulating the handle 41 the feed is ac:

curately adjusted.

.A spout 45 leads downwardly from the opening 30, and spouts 46 and 47 lead from the spout 45, there beingawind-valve 48 pivotally mounted, as usual, between the upper ends of the spouts 46 and 47 and there being a hand-hole 49, normally closed bya slide 50, through which the wind-Valve may be operated, so that when the valve is thrown to the right the flour will pass-to the left through the spout 46, and when the valve is thrown to the left the flour will pass to the right through the a handle connected to said shutter and extendspout 47. ing outwardly therefrom.

,I e1airn In testimony whereof I have signed my name Inadustless feeder and mixerfor flour-mills: to this specification in presence of two sub- 5 a sllilaft rotaably mounted; a hopper having scribing Witnesses.

Wa s curve and concentric to the shaft, and

having a discharge-opening; a screen in the ROBERT BOLL' discharge-opening; a beater-arm adjustably W'itnesses:

mounted upon the shaft; a curved shutter for W. C. BASTIN,

I regulating the passage through the screen and I. M. CAMPBELL. 

